CDT CAD/CAM Digital Dentistry 3

Question 1

What is the typical linear shrinkage percentage of zirconia blanks during the sintering process?

Accepted Answer

Approximately 20–25%

Answer

Zirconia pre-sintered blanks shrink approximately 20–25% linearly during sintering, and CAD software compensates by enlarging the milled design.

Question 2

Which scanning technology uses a structured light pattern projected onto a model to capture surface geometry?

Accepted Answer

White-light or blue-light structured light scanning

Answer

Structured light scanners project a known pattern of light and use triangulation to calculate surface coordinates with high accuracy.

Question 3

When designing a full-contour monolithic zirconia molar crown in CAD software, which anatomical landmark is most critical to replicate accurately for occlusal function?

Accepted Answer

Cusp tip positions and fossa locations

Answer

Accurate cusp tip positions and fossa locations determine proper occlusal contact and chewing efficiency.

Question 4

In a CAD/CAM implant workflow, what is the function of a scan body placed on the implant before intraoral scanning?

Accepted Answer

To encode implant position and angulation in the digital impression

Answer

Scan bodies have known geometries that allow CAD software to identify exact implant platform position and angulation.

Question 5

Which milling strategy uses a large-diameter bur first followed by progressively smaller burs to refine detail?

Accepted Answer

Roughing then finishing toolpath strategy

Answer

Roughing removes bulk material quickly while finishing passes use smaller burs to achieve accurate margins and fine anatomical detail.

(CDT) Certified Dental Technicians Practice Test

(CDT) Certified Dental Technicians Practice Test

CDT CAD/CAM Digital Dentistry 3